Fertilizer coating composite, its making method and multicomponent coated granular fertilizer

Abstract

The present invention relates to a coating composite for making coated granular fertilizer and its production method, and the fertilizer made up by using said coating composite. The coating composite is formed from coating agent, solidfying agent, nitrogen synergist, inorganic acid or organic acid, surfactant and adjuvant. As compared with non-coated fertilizer the nitrogen utilization rate of fertilizer produced by adopting said invention can be raised by 6%-10%, the fertilizer can be saved by 15-45%, and its fertilizer efficiency time can be obviously prolonged, and can be reached to 60-120 days.

Description

[Technical field]

[0001] The present invention relates to a coated fertilizer and a manufacturing method thereof. More particularly, the present invention relates to coating compositions used in coated fertilizers and methods of making them, and fertilizers made using such compositions. [Background technique]

[0002] As we all know, elemental nitrogen fertilizers or nitrogen-containing compound fertilizers are the most widely used solid granular fertilizers, all of which are water-soluble quick-acting fertilizers. Once these water-soluble quick-acting fertilizers are applied to the soil, part of the fertilizers can be absorbed and utilized by crops, but most of the fertilizers may cause serious losses due to leaching, volatilization or mineralization, resulting in very low utilization rates of fertilizers. It not only causes huge waste of resources, but also causes serious pollution of water area and atmospheric environment, which has attracted great attention from all ove...